<template>
  <div class="tab-bar-item" @click="itemClick">  <!--加入事件-->
    <!--插槽尽量不要附加其他东西-->
    <div v-if="!isActive">
      <slot  name="item-icon"></slot>
    </div>
    <div v-else>
      <slot  name="item-icon-active"></slot>
    </div>
    <div :style="activeStyle">
      <slot name="item-text"></slot>
    </div>
  </div>
</template>

<script>
  export default {
    name: "TabBarItem",
    props:{     //从父类获取一个叫path的属性
      path:{
        type:String,
        default:'/home'
      },
      activeColor:{
        type:String,
        default:'red'
      }
    },
    data() {
      return {
        // isActive: false,
      }
    },
    computed:{
      isActive(){
        // console.log(this.$route.path);  //要进入的路由地址
        // console.log(this.path);         //组件的属性
        // this 是component
        // this.$route是当前路由
        return this.$route.path.indexOf(this.path)!==-1;
      },
      activeStyle(){
        return this.isActive?{color:this.activeColor}:{};
      }
    },
    methods:{
      itemClick(){
        this.$router.push(this.path)
      }
    }
  }
</script>

<style scoped>
  .tab-bar-item {
    flex: 1;
    text-align: center;
    height: 49px;
  }

  .tab-bar-item img {
    width: 24px;
    height: 24px;
    margin-top: 3px;
    vertical-align: middle;
  }

  .active {
    color: red;
  }
</style>
